.

wcfs/wcfs_test.py

@@ -205,8 +205,8 @@ class tDB:
         # cases, when wcfs, even after receiving `kill -9`, will be stuck in kernel.
         # ( git.kernel.org/linus/a131de0a482a makes in-kernel FUSE client to
         #   still wait for request completion even after fatal signal )
-        t._closed     = chan()
-        t._wcfuseconn = os.stat(testmntpt).st_dev
+        t._closed      = chan()
+        t._wcfuseabort = open("/sys/fs/fuse/connections/%d/abort" % os.stat(testmntpt).st_dev, "w")
         go(t._abort_ontimeout, 7*time.second)   # NOTE must be >> with_timeout
 
         # ZBigFile(s) scheduled for commit
@@ -252,14 +252,16 @@ class tDB:
             return  # tDB closed = testcase completed
 
         # timeout -> force-umount wcfs
-        print("\nC: test timed out after %.1fs -> aborting wcfs fuse connection"
-              " to unblock" % (dt / time.second), file=sys.stderr)
-        writefile("/sys/fs/fuse/connections/%d/abort" % t._wcfuseconn, b"1\n")
+        print("\nC: test timed out after %.1fs" % (dt / time.second), file=sys.stderr)
+        print("-> aborting wcfs fuse connection to unblock ...", file=sys.stderr)
+        t._wcfuseabort.write(b"1\n")
+        t._wcfuseabort.flush()
 
     # close closes test database as well as all tracked files, watch links and wcfs.
     # it also prints change history to help developer overview current testcase.
     @func
     def close(t):
+        defer(t._wcfuseabort.close)
         defer(t._closed.close)
 
         # unmount and wait for wcfs to exit